I don't see how the coin box mounting plate would interfere with you using it as a reach in cooler? I'd leave it alone incase you ever want to convert back or sell. plus you have to do this prior to any restoration as you will have to do body work to make it look good once grinding and such?
I agree. That mounting plate doesn't stick up too high. It doesn't come off without major work like as cohammer eluded to.